The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 2020
Filed:
Jul. 05, 2018
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Manabu Takahashi, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
A fuel cell system comprises: a fuel cell stack having a plurality of unit cells in which anode gas flow paths are formed; an anode gas supply unit configured to supply anode gas to the fuel cell stack via an anode gas supply port of the fuel cell stack; a pressure sensor provided between the anode gas supply port and the anode gas supply unit to measure anode gas supply pressure; a current sensor configured to measure electric current of the fuel cell stack; and a controller configured to control anode gas supply quantity of the anode gas supply unit to thereby control the anode gas supply pressure. The controller is configured to, when there has been satisfied a blockage-predictable condition indicating that occurrence of blockage due to liquid water in the anode gas flow paths of at least one unit cell is predictable, calculate a first pressure for setting a stoichiometric ratio of anode gas to a predetermined value, the stoichiometric ratio being calculated from a current of the fuel cell stack and the anode gas supply quantity, then compare the first pressure with a second pressure for resolving blockage in the anode gas flow paths due to liquid water to determine a higher-in-value one of the first pressure and the second pressure as a selected pressure, and control the anode gas supply quantity so that the anode gas supply pressure becomes the selected pressure.